Right-click the cell that contains the field [Qty] , and click Add Total. This adds a sum of the quantity for each order to the totals row. In the empty cell to the left of Sum[Qty] , type the label  Order Total . You can add a background color to the totals row. Select the two sum cells and the label cell.
Ladder logic is the first in a series exploring different software programming methods how to choose the most appropriate model of computation based on system requirements and architecture. Future articles will cover textual, function block/data flow, state chart, and simulation and modeling methods.
This software, called ladder logic or a ladder diagram, looks and executes similarly to an electrical diagram. The illustration of âOne rung of ladder logicâ shows that the left rail is the power bus and the right rail is the ground bus. Power flows through a series of normally open or normally closed contacts and powers a coil. Open contacts block power and closed contacts pass power.